Wide-range thermometry based on green up-conversion of Yb3+/Er3+ co-doped KLu2F7 transparent bulk oxyfluoride glass ceramics

Cao, Jiangkun; Chen, Weiping; Dong, Xu; Hu, Fangfang; Chen, Liping; Guo, Hai

doi:10.1016/j.jlumin.2017.10.020

Cited by 104 publications

(34 citation statements)

References 37 publications

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“…An effective approach to manufacture superior scintillators is developing transparent glass‐ceramics (GC) in which fluoride nanocrystals are embedded in the oxide glass matrix. The oxyfluoride GC samples not only possess lower phonon energy related to the fluoride nanocrystals, but also have good mechanical and chemical stability related to the oxide glass matrix . In brief, compared to crystals and ceramic scintillators, GC scintillators for X‐ray detections possess excellent luminescent and XEL properties from nanocrystals, and maintain the good stability and elaboration superiorities of glass.…”

Section: Introductionmentioning

confidence: 99%

Tb³⁺‐doped transparent BaGdF₅ glass‐ceramics scintillator for X‐ray detector

Zheng

Wei

et al. 2019

J Am Ceram Soc

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Commercial Bi4Ge3O12 (BGO) monocrystal scintillator is relatively complicated to produce and too expensive. Therefore, it is desired to look for alternative scintillating materials with simple process, low consumption, large size, and high efficiency. Here, glass‐ceramics (GC) with high volume fraction of crystal phase and high density by increasing the proportion of heavy metal fluorides in the composition were designed. And bulk Tb3+‐doped transparent BaGdF5 glass‐ceramics with 23.3% crystal volume ratio and density of 4.65 g/cm3 have been prepared. The structural, optical, and luminescent properties of precursor glass and GC were systematically explored through series of characterization techniques including X‐ray diffraction (XRD), transmittance spectra, transmission electron microscope (TEM), photoluminescence (PL) spectra, and X‐ray excited luminescence (XEL). After heat treatment, both PL emission and XEL intensity of GC are enhanced because of the movement of Tb3+ ions from the amorphous glass matrix into BaGdF5 nanocrystals, which possess lower phonon energy and better crystal field. The luminescent quantum efficiency of GC reaches 30.7% and the XEL intensity of GC is around 140% of that of the commercial BGO scintillating crystal. Our results demonstrate that BaGdF5:Tb3+ GC may act as efficient scintillator for X‐ray detection.

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Section: Introductionmentioning

confidence: 99%

Tb³⁺‐doped transparent BaGdF₅ glass‐ceramics scintillator for X‐ray detector

Zheng

Wei

et al. 2019

J Am Ceram Soc

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“…It hints the Li 2 SrSiO 4 :4%Tb 3+ phosphor has a good thermal quenching effect with respect to Ca 3 Si 2 O 7 :Tb 3+ green phosphors . The activation energy ( E a ) can be calculated for the optimized phosphor by Arrhenius equation as follows: ;

ln (\frac{I_{0}}{I}) = ln A - \frac{E_{a}}{k T}

…”

Section: Resultsmentioning

confidence: 99%

Tunable emission color of Li₂SrSiO₄:Tb³⁺ due to cross‐relaxation process and optical thermometry investigation

et al. 2018

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A series of Li2SrSiO4:xTb3+ (0.2%, 0.4%, 0.6%, 0.8%, 2%, 4%, and 6%) phosphors were prepared by conventional solid‐state reaction. It was found that this silicate phosphor has a wide excitation band at near‐ultraviolet region (230‐300 nm) due to spin‐allowed 4f 8→4f75d1 transitions of Tb3+ ions, with the exact position dependent on the crystal field of the lattice. The cross‐relaxation process originating from 5D3→5D4 and 7F6→7F0 happened between different Tb3+ ions. It leads to the luminescence color of Li2SrSiO4: xTb3+ tuning from blue to green just by controlling Tb3+ concentrations. Furthermore, concentration quenching mechanism, energy migration type, cross‐relaxation rate and efficiency, are discussed in detail. Finally, optical thermometry properties were investigated via temperature‐dependent emission spectra. The results show that low‐concentration‐doped sample (Li2SrSiO4:0.4%Tb3+) shows remarkable optical thermometry based on fluorescence intensity ratio (FIR) between the blue and green emission of Tb3+ ions, whereas the high‐concentration‐doped sample (Li2SrSiO4:4%Tb3+) demonstrates small emission intensity loss. It illustrates that terbium‐doped silicate phosphor is a multifunctional material with potential application for display field and optical thermometry.

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“…Since FIR is independent of the fluorescence loss and fluctuation under excitation, the temperature dependence of the measurement conditions can be negligible. As the groundwork of many temperature‐sensitive optical devices, the FIR technique takes advantage of two adjacent thermally coupled energy levels (TCELs) of rare earth ions . Thanks to the wide choice of temperature range, flexible device structures and controllable energy levels, the FIR based non‐contact temperature sensor is regarded as a promising option for optical thermometry .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and up‐conversion of Er³⁺ and Yb³⁺ Co‐doped LiY(MoO₄)₂@SiO₂ for optical thermometry applications

et al. 2019

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Non‐contact temperature sensors based on the fluorescence intensity ratio (FIR) have been widely investigated owing to their high sensitivity and reliable real‐time monitoring. Herein, the SiO2‐coated LiY(MoO4)2@SiO2:Er3+,Yb3+ phosphor was investigated as an optical thermometry material, which was synthesized using the conventional solid state reaction and coated by a facile wet chemical route. The effect of surface modification on FIR was systematically characterized by structural analyses and spectral measurements and the temperature‐dependent up‐conversion FIR was investigated from 303 to 603 K under a 980 nm laser excitation. The results showed that the FIR value was thermally stable and the SiO2 coating led to a higher FIR sensitivity as well as a higher saturation threshold. This work would pave a way to design interesting optical thermometry materials in up‐conversion phosphors with better properties.

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Wide-range thermometry based on green up-conversion of Yb3+/Er3+ co-doped KLu2F7 transparent bulk oxyfluoride glass ceramics

Cited by 104 publications

References 37 publications

Tb³⁺‐doped transparent BaGdF₅ glass‐ceramics scintillator for X‐ray detector

Tb³⁺‐doped transparent BaGdF₅ glass‐ceramics scintillator for X‐ray detector

Tunable emission color of Li₂SrSiO₄:Tb³⁺ due to cross‐relaxation process and optical thermometry investigation

Synthesis and up‐conversion of Er³⁺ and Yb³⁺ Co‐doped LiY(MoO₄)₂@SiO₂ for optical thermometry applications

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Wide-range thermometry based on green up-conversion of Yb3+/Er3+ co-doped KLu2F7 transparent bulk oxyfluoride glass ceramics

Cited by 104 publications

References 37 publications

Tb3+‐doped transparent BaGdF5 glass‐ceramics scintillator for X‐ray detector

Tb3+‐doped transparent BaGdF5 glass‐ceramics scintillator for X‐ray detector

Tunable emission color of Li2SrSiO4:Tb3+ due to cross‐relaxation process and optical thermometry investigation

Synthesis and up‐conversion of Er3+ and Yb3+ Co‐doped LiY(MoO4)2@SiO2 for optical thermometry applications

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Product

Resources

About

Tb³⁺‐doped transparent BaGdF₅ glass‐ceramics scintillator for X‐ray detector

Tb³⁺‐doped transparent BaGdF₅ glass‐ceramics scintillator for X‐ray detector

Tunable emission color of Li₂SrSiO₄:Tb³⁺ due to cross‐relaxation process and optical thermometry investigation

Synthesis and up‐conversion of Er³⁺ and Yb³⁺ Co‐doped LiY(MoO₄)₂@SiO₂ for optical thermometry applications